SPOILERS! (I keep spoiling everything. Sorry.)

<<In Heaven>>
Augustus: Hey, Alaska, do you want a cigarette?
Alaska: Sure.
Alaska: Here, let me light it for you.
Augustus: No, it's okay. I don't light mine.
Alaska: Why not?
Augustus: It's kinda my thing. You see, it's a metaphor. You put the killing thing between your teeth but don't give it the power to do the killing. Get it?
Alaska: *snorts*
Augustus: What?
Alaska: I guess that's our main difference. I smoked to die. You did to prove you wouldn't.